package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */

@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    public boolean preHandle(HttpServletRequest request, HttpServletResponse
            response,Object handler){
        //判断当前拦截到的是controller的方法还是资源
        if(!(handler instanceof HandlerMethod))
            //如果当前拦截的是静态资源不是方法就放行
            return true;

        try {
            //从请求头中获得令牌
            String token = request.getHeader(jwtProperties.getUserTokenName());

            //校验令牌
            log.info("jwt校验:{}",token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId= Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("当前用户的id:",userId);

            //放行通过
            return true;
        } catch (Exception e) {
           //不通过,响应状态码
            response.setStatus(401);
            return false;
        }


    }


}
